<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert title="消息提示的文案" type="warning" center show-icon :closable="false"> </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 标签页 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabsLeave" @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-alert title="只允许为第三级分类设置相关参数" type="warning" :closable="false" show-icon class="alert"> </el-alert>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange" clearable></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片要上传到的后台api地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headersobj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传图片，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加按钮 -->
            <el-button type="primary" class="addbtn" @click="addGood">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 上传图片数组
        pics: [],
        // 介绍商品详情
        goods_introduce: '',
        //商品的参数  动态参数 静态属性
        attrs: []
      },
      // 验证规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请输入商品分类', trigger: 'blur' }]
      },
      // 商品数据列表
      catelist: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [],
      //静态属性列表数据
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的headers请求对象
      headersobj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片路径数据
      previewPath: '',
      //控制图片预览的显示与隐藏
      previewVisible: false
    }
  },
  created() {
    // 获取商品分类数据
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败!')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 点击级联选择器触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //切换标签
    beforeTabsLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是' + oldActiveName)
      // console.log('即将进入的标签页名字是' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类!')
        return false
      }
    },
    //面板的点击事件
    async tabClick() {
      // console.log(this.activeIndex)
      //进入动态商品参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.threeId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          this.$message.error('获取动态参数列表失败!')
        }

        console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.threeId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败!')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //处理 移除图片
    handleRemove(file) {
      console.log(file)
      const filePath = file.response.data.tmp_path
      //1.获取删除图片的临时路径
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      //2.从pics数组中,找到这个图片对应的索引值
      //3.调用数组的splice方法,把图片信息对象从pics数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 上传图片成功调用这个函数
    handleSuccess(response) {
      console.log(response)
      //1.拼接得到一个图片信息对象
      const picsInfo = { pic: response.data.tmp_path }
      //2.将图片的信息对象,push到pics数组中
      this.addForm.pics.push(picsInfo)
      console.log(this.addForm)
    },
    // 添加商品按钮 触发函数
    addGood() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请补全必要表单项')
        }
        //执行添加业务逻辑
        //lodash cloneDeep(obj)深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起添加商品请求
        // 商品名称 必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    threeId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-steps {
  margin-top: 20px;
}
.alert {
  width: 260px;
}
.el-checkbox {
  margin: 0 15px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.addbtn {
  margin-top: 15px;
}
</style>
